The father of missing Trevor Deely says his family are trying to "remain as positive as they can" some 14 years after his disappearance.

Speaking to RTE Radio One's Aine Lawlor this morning, Michael Deely said the mystery surrounding their young son's disappearance keeps them awake at night.

Trevor Deeley, who was 22 at the time and from Kildare, was last seen at 4.10am on December 8, 2000, walking down Haddington Road, close to his apartment, in Dublin after leaving an office Christmas party.

December 8, 2000, was a wild stormy night when Trevor went to Copper Face Jacks in Harcourt Street at 8pm, later going to the Hilton Hotel in Charlemont Place at 9pm.

He later went to Buck Whaley's night club in Leeson Street, leaving there at 3.30am.

He went back to his office where he checked his email and picked up a blue ACC golf umbrella, leaving the office at 4am.

He rang his best friend, Glen, leaving a message saying he had had a great night and would talk to him later.

CCTV footage picked up Trevor walking close to Baggot Bridge holding his umbrella at 4.14am. No trace of him has emerged since.

“It was something that I as a father, listening to the radio reports of missing people, I thought ‘I hope we’re never touched by that’... it’s so long and drawn out. Here we are 14 years on.”

Mr Deeley said despite the pain of not knowing where Trevor is, his family remains strong and united.

“Our goal is to keep that strength of will... I’ve heard of several families that have been shattered by it.

“The only thing I always say, the fact that we haven’t heard anything negative ... we can still remain positive as well."

Fourteen years after he was last seen, the family remains deeply affected by Trevor's disappearance.

“We’re so affected by this anyway... if he walked in in the morning, we’re still affected by it.

“If any of us sit down to dinner, Trevor might drop in, that’s not happening now, there are anniversaries, birthdays all through the year that leave that gap there.”

“We’ve had lots of professional help from the start. The first man that came in the house was Fr john in Naas. We’ve continued to go to our local GP in Naas and he’s been excellent. And Ann [Trevor's mother] is still playing tennis.”

“We dont’ know how long it’s going to go on. We’ve to try and support ourselves and keep all the help we can around us and keep as positive as we can.”

Michael will forever remember the last conversation between himself and his young son.

“I remember distinctly him saying to me that he wouldn’t see us next weekend, that there was something on and he wouldn’t be home.”

Mr Deeley remembers the last time he saw his son, on the Tuesday night before he went missing.

“He was enjoying a nice steak dinner at the time. He was telling me about the icebergs, he was gobsmacked about the shrinking of the icebergs, he was into that – global warming.”

“And I said ‘oh listen I’ll have more time to talk to you next time I see you’.

“He was a little bit relaxed; he certainly wasn’t highly strung. He enjoyed life and he was always at the centre of a group.”